Draw the free body diagram of the cart (both horizontal and vertical forces) at t = 2 s.

How have the competing explanations' experiments on atoms affected the development of the atomic model?

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

What are the north and south poles of a solenoid change with?